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38 Cards in this Set
- Front
- Back
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The decidious or primary period of tooth development is from when?
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6 Months to 6 years and includes primary teeth only.
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The transitional period of tooth development is from when?
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6 yrs to 12 yrs. both primary and permanent teeth present.
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The permanent period of tooth development is from?
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After 12 years old and includes only permanent dentition.
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The eruption of the 20 decidious teeth occur over a period of ____ years?
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2.5
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Differences in eruption times can be due to?
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Race and gender.
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There is usually a _____ progression in the eruption of teeth?
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Anterior to posterior.
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The first teeth to erupt in the primary dentition are the?
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Central incisiors
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The last teeth to erupt in the primary dentition are the?
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Second molars with the exception of the canines
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The _____ teeth usually erupt first?
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Mandibular
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Teeth usually emerge earlier in?
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Females
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What are the three stages of tooth development?
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First transition period
Intertransitional period Second transition period |
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The first transition period involves
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The change in dentition from fully deciduous teeth to the early phase of mixed dentition
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The first transition period starts?
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About 6 years old and lasts for about 2 years.
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The 3 key stages in the 1st transition period are?
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Eruption of 1st permanent molars.
Exfoliation of decidious insisors. Eruption of permanent incisors. |
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___ initiates the 1st transition period?
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Molar eruption.
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The mandibular molars are quickly followed by the
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Maxillary molars.
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The sequence of the 1st transition period includes?
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molars, mand central incisors,(max central incisors, mand lateral incisors), max lateral incisors.
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The 1st transition period is usually completed by age?
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8
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The intertransitional period of eruption is?
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Period after the eruption of the permanent incisors and 1st molars until the premolars, second molars, and canines begin to erupt.
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The intertransitional period last?
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1.5 years.
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What are the 3 key features of the second transition period.
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– Exfoliation of the deciduous canines and deciduous molars
– Eruption of the permanent canines and premolars – Eruption of the permanent 2nd molars |
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The second transition period begins?
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at 9-12 years and ends at age 10 to 13. Usually lasts about 1 year.
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The eruption sequence in the 2nd transition period is?
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– Maxilla:
• 1st premolar-canine-2nd premolar • 1st premolar-2nd premolar-canine – Mandible: • Canine-1st premolar-2nd premolar • 1st premolar-canine-2nd premolar |
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In the 2nd transition period the eruption of 2nd permanent molars are after?
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The anterior teeth.
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The eruption of the 2nd permanent molars defines the?
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End of the 2nd transitional period.
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The 3rd molar eruption occurs after the?
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2nd transition period.
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From birth to 8 months there are?
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No visible teeth in the mouth.
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From 8 months to 2.5 years?
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All primary teeth have emerged in the childs mouth.
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From 2.5 years to 6 years?
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All primary teeth present. No permanent teeth visible in childs mouth.
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At 6 years?
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The permanent teeth start to appear, begining with the 1st permanent molars, loss of decidious mandibular central incisors, and eruption of permanent mandibular central incisor.
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From 6 to 8 years?
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All decidious incisors have been replaced by permanent incisors.
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From 9 to 12 years?
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All 8 premolars and 4 canines have erupted and replaced dec molars and canines (Remaining succedaneous teeth have erupted).
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At 12 years?
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Permanent 2nd molars have emerged.
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17 to 21 years?
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Permanent 3rd molars have erupted if present.
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At 6 years?
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Permanent 1st molars erupt.
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6-9 years?
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Permenent incisors erupt.
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From 9-12 years?
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Permanent canines and premolars erupt.
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at 12 years?
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2nd molars erupt.
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